Problem with login

Hey,guys ! I've just downloaded Mists of Pandaria.Till today i was playing Wrath of The Lich King and I didn't met any problems.It is possible to sounds funny,but i can't find the realmlist file in the MOP directory,so i can't change the adress...when i try to login with my WOTLK account it writes me that i need to transfer this account to battle.net..any suggestions or solutions ? (Sorry for the broken english).